Apologies for being a bit dense on this one, as it's the first I've seen, but does the first person have to pay for the bundle, and then all subsequent "purchases" are free, or does it work differently to that?

Apologies for being a bit dense on this one, as it's the first I've seen, but does the first person have to pay for the bundle, and then all subsequent "purchases" are free, or does it work differently to that?